—May I go out tonight?
—Of course you can, you promise to be back before 10 o’clock.
A. as soon as
B. as well
C. as long as
D. as usual
网友回答
A. as soon as
B. as well
(答案→)C. as long as
D. as usual
解析：考查连词词组：A. as soon as一…就，B. as well也，C. as long as只要，D. as usual象平常一样。句意：--今晚我可以出去吗？--当然可以，只要你答应10点前回来。选C。